Home / 20,935.51-28,889.32-11,980.96

Finding the Fourth Proportional to 20,935.51, 28,889.32 and 11,980.96

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Solution

The fourth proportional to 20,935.51, 28,889.32 and 11,980.96 is: 16,532.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.51 : 28,889.32 = 11,980.96 : x
  2. Step 2: Convert to fraction form
    20,935.51/28,889.32 = 11,980.96/x
  3. Step 3: Cross multiply
    20,935.51x = 28,889.32 × 11,980.96
  4. Step 4: Simplify right side
    20,935.51x = 346,121,787.35
  5. Step 5: Solve for x
    x = 346,121,787.35/20,935.51
  6. Step 6: Final answer
    x = 16,532.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.